Hydraulic Suspension LOCKOUT WILL NOT ENGAGE (HMMH). cont'd -680640350

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

Step 6. Check for +24 VDC between wire 713 (10) and ground at control switch (5).

If +24 VDC is not present, replace control switch (5) by

removing wire 712 (8), wire 714 (9), wire 713 (10), knob (11),

nut (12), and control switch.

If +24 VDC is present, go to step 7.

Step 7. Check for +24 between wire 713 (10) and ground at solenoid relay (13).

If +24 VDC is not present, repair wiring 713 between control

switch and solenoid relay.

If +24 VDC is present, go to step 8.

Step 8. Check wire 03 (14) at solenoid relay (13) for continuity to ground.

If open to ground, repair wiring 03 between solenoid relay and

NATO slave receptacle.

If short to ground, go to step 9.

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